cx25870 Conexant Systems, Inc., cx25870 Datasheet - Page 228

• Manufacturer Part Number: cx25870
• Description: Video Encoder With Adaptive Flicker Filtering And Hdtv Output
• Manufacturer: Conexant Systems, Inc.

Appendix A Scaling and I/0 Timing Register Calculations
Table A-23. Overscan Values 1024 x 768 NTSC, Character Clock-Based Controller, 8-Pixel Resolution, >1.50 µs HBlank
A-46
H_CLKI
1176
1176
1160
1152
1200
1200
1200
1200
1200
1200
1240
1280
1320
1176
1176
1160
1152
1200
1200
1200
1200
1200
1200
1128
1240
1280
Controller Pixels
Total
V_LINESI
1050
1050
1029
1008
1050
1050
1029
1008
1050
975
945
966
987
945
924
945
945
945
975
945
966
987
945
924
945
945
V_ACTIVEO
Active
192
207
214
192
196
200
209
205
214
219
214
214
214
192
207
214
192
196
200
209
205
214
219
192
214
214
Encoder Pixels
Conexant
H_CLKO
Total
1568
1456
1392
1536
1568
1536
1472
1504
1440
1408
1488
1536
1584
1568
1456
1392
1536
1568
1536
1472
1504
1440
1408
1504
1488
1536
Flicker-Free Video Encoder with Ultrascale Technology
Horizontal
21.18
15.11
11.21
19.53
21.18
19.53
16.03
17.82
14.17
12.22
16.94
19.53
21.97
21.18
15.11
11.21
19.53
21.18
19.53
16.03
17.82
14.17
12.22
17.82
16.94
19.53
Overscan (Percent)
Vertical
20.99
14.81
11.93
20.99
19.34
17.70
13.99
15.64
11.93
11.93
11.93
11.93
20.99
14.81
11.93
20.99
19.34
17.70
13.99
15.64
11.93
20.99
11.93
11.93
9.88
9.88
CX25870/871
Delta
–
–
10.04
–
–
–
0.19
0.30
1.83
1.84
2.04
2.18
2.23
2.34
5.00
7.60
0.19
0.30
1.83
1.84
2.04
2.18
2.23
2.34
5.00
7.60
0.73
1.45
0.73
1.45
3.17
100381B